Article
Chemistry, Multidisciplinary
Amal H. Al-Bagawi, Nikita Yushin, Nasser Mohammed Hosny, Islam Gomaa, Sabah Ali, Warren Christopher Boyd, Haitham Kalil, Inga Zinicovscaia
Summary: In this study, In2O3 nanoparticles and Arthrospira platensis were used as adsorbents for terbium removal from aqueous solutions. The adsorption efficiency of both adsorbents was found to be dependent on the time and pH, with Arthrospira platensis showing the highest removal at pH 3.0 and In2O3 at pH 4.0-7.0. The maximum adsorption capacity calculated from the Langmuir model was 212 mg/g for Arthrospira platensis and 94.7 mg/g for In2O3 nanoadsorbent. These adsorbents have potential for terbium recovery from wastewater.
Article
Chemistry, Analytical
L. Dimowa, N. Lihareva, Y. Tzvetanova, O. Petrov, T. Todorova, I Piroeva
Summary: The kinetics of Cs+ uptake by natural and synthetic mordenites was studied in this research. The experimental data was best fitted to the pseudo-second-order rate model, indicating that both intra-particle diffusion and liquid film diffusion mechanisms influenced the uptake process. Rietveld XRD structural analysis revealed the preferred positions occupied by Cs+ cations during ion-exchange, with the presence of Na+ ions in the initial samples making the exchange sites more accessible to Cs+ ions.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Engineering, Environmental
Mai Ngoc Nguyen, Muhammad Yaqub, Seongbeom Kim, Wontae Lee
Summary: Water-soluble and insoluble Prussian blue (PB), named PB-sol and PB-insol, were synthesized to investigate cesium (Cs+) removal from aqueous solution. Various factors affecting adsorption, such as pH, competitive ions, initial Cs+ concentration, and kinetics, were studied. The PBs' performance was optimized using a gene expression programming (GEP) model, with promising results for both PB-sol and PB-insol.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Yasser GadelHak, Esraa Salama, Samah Abd-El Tawab, Eman Abouzied Mouhmed, Dalal Hussien M. Alkhalifah, Wael N. Hozzein, Mona Mohaseb, Rehab K. Mahmoud, Rafat M. Amin
Summary: The valorization of spent wastewater nanoadsorbents is a promising technique for supporting circular economy strategies. The synthesis of ZnCoFe mixed metal oxide (MMO) using co-precipitation was investigated. The MMO showed high adsorption capacity for ceftriaxone sodium and could be effectively recycled for malachite green removal. Additionally, the MMO exhibited antimicrobial properties, highlighting its potential as a value-added material for adsorbent production.
Article
Environmental Sciences
Ramesh Vinayagam, Shraddha Pai, Gokulakrishnan Murugesan, Thivaharan Varadavenkatesan, K. Kaviyarasu, Raja Selvaraj
Summary: This study successfully synthesized hydroxyapatite (HAp) using the green chemistry approach and the leaf extract of copper pod tree, and investigated its adsorption potential for Acid blue 113 (AB113) dye. The synthesized HAp exhibited rod-shaped morphology with prominent Ca and P elements. It had high crystallinity and thermal stability. The HAp suspension showed good stability with a Zeta potential of -17.7 mV. BET studies confirmed the mesoporous structure and a high specific surface area. The HAp's ability to adsorb AB113 was examined under various process parameters. Batch experiments revealed that optimal dye removal (92.72%) was achieved at pH 8, with a dosage of 1 g/L CP-HAp nps, 20 ppm AB113 concentration, 120 min contact time, 150 rpm agitation speed, and room temperature. The maximum adsorption capacity was determined as 120.48 mg/g. Different isotherms and kinetics were used to describe the adsorption behavior, with the Freundlich isotherm and pseudo-second-order kinetics showing good fitting. Thermodynamic investigations indicated that the adsorption process was spontaneous and exothermic. Overall, this study highlights the suitability of HAp nanoadsorbent for the removal of AB113 dye from wastestreams.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Jiaxin Li, Janina Kossmann, Ke Zeng, Kun Zhang, Bingjie Wang, Christian Weinberger, Markus Antonietti, Mateusz Odziomek, Nieves Lopez-Salas
Summary: Self-templating is an easy method to synthesize porous carbons through direct pyrolysis of organic metal salts. However, the method usually has low yields and limited specific surface areas due to the low activity of metal cations. In this study, cesium acetate is used as the precursor to produce oxo-carbons with large specific surface areas, high pore volume, adjustable oxygen contents, and high yields. The oxo-carbons show exceptional CO2 uptake and supercapacitor performance. This research helps to understand and design materials using organic solid-state chemistry, which is still rare.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biotechnology & Applied Microbiology
Mostafa Mahinroosta, Ali Allahverdi
Summary: This study focused on valorizing secondary aluminum dross into gamma-aluminum oxide (γ-Al2O3) through a pilot-scale extraction system. The obtained γ-Al2O3 exhibited good fluoride adsorption performance, even after multiple regenerations, indicating its potential for practical applications in fluoride removal from water.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Multidisciplinary
Xinyu Zheng, Cong Shen, Yongfu Guo, Huaili Zheng
Summary: The development of efficient approaches to remove tetracyclines from water is of great importance due to their severe threat to aquatic environments and human health.
Article
Green & Sustainable Science & Technology
Junfang Sun, Ji Chen, Xiang Peng, Yu Zhang, Jialin Mo, Xin Liao, Qiang Tang
Summary: Nuclear energy is a double-edged technology with both significant benefits and potential hazards. The 2011 Fukushima nuclear power plant accident highlighted the importance of appropriate adsorption methods in handling radioactive substances such as Cs+. Zeolite, both natural and modified, was investigated as an effective adsorbent in this study. The optimal dosage and maximum adsorption rate were determined, and the influence of various factors was examined. The results showed that an alkaline environment was more favorable for adsorption, and the Redlich-Peterson isothermal model and intragranular diffusion model provided the best fit for the data. The highest adsorption capacity was found in Mg-zeolite, indicating its superior performance in removing Cs+.
Article
Chemistry, Applied
Mohit Chaudhary, Shweta Rawat, Abhijit Maiti
Summary: This review provides insights into recent advancements in the adsorption of fluoride using various nanoadsorbents. The use of bare nanocomposites shows the best fluoride adsorption performance.
SEPARATION AND PURIFICATION REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Ning Yuan, Xin-Rui Gong, Bao-Hang Han
Summary: The study proposed a strategy of post-synthesis modification using hydrophobic perfluoroalkyl acid to produce MOF nanoadsorbents with enhanced adsorption capacity for organic solvents, as demonstrated by UiO-66-F. The modified nanomaterial also showed good oil-water separation capabilities and efficiency in removing pollutants such as carbamazepine from water.
ACS APPLIED NANO MATERIALS
(2021)
Article
Engineering, Environmental
Chenyang Yang, Kuk Cho
Summary: This study demonstrated that potassium antimony tin sulfide (KATS-2) had a high ion exchange capacity and selectivity for cesium removal from water, showing rapid ion exchange kinetics and excellent stability, making it a promising adsorbent for contaminated water treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xindai Li, Guangming Xu, Meng Xia, Xinyao Liu, Fuqiang Fan, Junfeng Dou
Summary: Nuclear energy is important for future power generation, but the disposal of nuclear waste remains challenging. Adsorption is commonly used for removing cesium from wastewater, but there is a lack of systematic literature on this topic. This study used bibliometric analysis to review and summarize current trends, influential authors and institutions, and research hotspots. It revealed three periods of rapid development and suggested future directions for research.
Article
Environmental Sciences
Moustafa A. Hamoud, Shereen F. Abo-Zahra, Mohamed A. Attia, Hanan H. Someda, Mamdoh R. Mahmoud
Summary: Natural zeolite modified with CTAB is capable of simultaneously adsorbing Cs+ cations and HCrO4- anions. The adsorption efficiency of CTAB-zeolite is highest in the pH range of 2.5-4.2. Kinetic and equilibrium adsorption parameters were obtained using a double-exponential kinetic model and the Redlich-Peterson isotherm model, respectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Vanessa Proust, Alban Gossard, Joseph Schaeperkoetter, Samuel Vannier, Thomas David, Yves Barre, Scott Misture, Agnes Grandjean, Hans-Conrad zur Loye
Summary: Researchers are facing the challenge of dealing with an increasing amount of nuclear waste and the serious threat it poses to the environment. They are working on developing highly selective sorbents and ensuring safe disposal. Zeolite-containing geopolymers are being explored as a potential solution, as they combine the adsorption properties of zeolite with the structural flexibility of geopolymer binders. By dispersing NaY zeolite particles in a geopolymer binder, porous composites were prepared and their structural properties analyzed.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Kwang-Wook Kim, Richard I. Foster, Jimin Kim, Hyun-Hee Sung, Dasom Yang, Woo-Jung Shon, Maeng-Kyo Oh, Keun-Young Lee
JOURNAL OF NUCLEAR MATERIALS
(2019)
Article
Nuclear Science & Technology
Kwang-Wook Kim, Woo-Jung Shon, Maeng-Kyo Oh, Dasom Yang, Richard Foster, Keun-Young Lee
NUCLEAR ENGINEERING AND TECHNOLOGY
(2019)
Article
Environmental Sciences
Keun-Young Lee, Sang-Hyo Lee, Ju Eun Lee, Seung-Yop Lee
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Engineering, Environmental
Richard I. Foster, Kwang-Wook Kim, Maeng-Kyo Oh, Keun-Young Lee
Article
Engineering, Environmental
Richard I. Foster, Maeng-Kyo Oh, Dasom Yang, Woo-Jung Shon, Kwang-Wook Kim, Keun-Young Lee
WATER SCIENCE AND TECHNOLOGY
(2019)
Article
Chemistry, Analytical
Richard I. Foster, Kwang-Wook Kim, Keunyoung Lee
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Richard Foster, Maengkyo Oh, Keunyoung Lee, Kwang-Wook Kim
Article
Chemistry, Analytical
Min Ku Jeon, Sung-Wook Kim, Keun-Young Lee, Maeng-Kyo Oh
Summary: The study indicates that chlorination reaction is a feasible method for treating Sr-90-contaminated concrete waste. Thermodynamic calculations show that SrO can be efficiently converted into SrCl2 at high temperatures, with CaO exhibiting higher conversion ratios and CaCO3 showing lower ratios.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
Woo-Jung Shon, Richard Foster, Maengkyo Oh, Keunyoung Lee, Kwang-Wook Kim
Summary: A chemical treatment process using a precipitation method was adopted to remove radionuclides associated with concrete from decommissioning of nuclear power plants. Co-60 and Eu-152 were selectively removed from dissolved-concrete liquor as precipitates, with decontamination factors of at least 6666 for Co-60 and 10,000 for Eu-152, meeting the release requirement for decontaminated radioactive wastewaters in Korea.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
Maengkyo Oh, Keunyoung Lee, Kwang-Wook Kim, Richard Foster, Chang-Ha Lee
Summary: The applicability of uranium peroxide precipitation method for removing uranium from secondary wastewaters has been studied. Optimized conditions were applied to achieve high removal efficiency within a short time. The method also removed other impurities and met the criteria for secondary wastewater discharge.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Min Ku Jeon, Sung-Wook Kim, Hee-Chul Eun, Keunyoung Lee, Hyungsub Kim, Maengkyo Oh
Summary: A new approach to recycle Li(Ni,Co,Mn)O-2 (NCM) is introduced and experimentally demonstrated. Chlorine gas is used to selectively extract Li from NCM and successfully recover transition metals. Through this method, a 94.9% recovery ratio of transition metals and a 35.8% recovery ratio of Li are achieved, leading to the successful re-synthesis of a new NCM.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Metallurgy & Metallurgical Engineering
Maengkyo Oh, Keunyoung Lee, Richard Foster, Ik-Soo Kim, Chang-Ha Lee
Summary: This study aimed to treat radioactive acidic wastewater containing radioactive 60Co and 152Eu. The solvent extraction method was evaluated for its applicability in separating the radioactive nuclides. Results showed that Cyanex301 could easily extract Co and Eu from Ca-rich wastewater without extracting Ca, while Cyanex272 could selectively separate Eu without extracting Co and Ca at pH 2-3. The extracted Co and Eu from the wastewater could be considered as non-radioactive industrial waste after being treated, which can be economically and easily handled. Additionally, the separated Co and Eu may be reused for research and industrial applications through waste valorization.
ARCHIVES OF METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hyung-Ju Kim, Hee-Chul Yang, Keunyoung Lee, Richard I. Foster
Summary: This article describes the formation of crystallized glass adsorbents for capturing and mineralizing radioactive carbon dioxide (C-14) under mild conditions, allowing for long-term geological disposal of hazardous C-14. The best performing crystallized glass adsorbents showed a maximum CO2 capacity of 4.54 mmol g(-1) and a carbonation reaction rate of 8.04 mmol g(-1) h(-1).
MATERIALS ADVANCES
(2022)
Article
Engineering, Environmental
Maengkyo Oh, Keunyoung Lee, Richard Foster, Chang-Ha Lee
Summary: This study presents a method to reduce the volume of radioactive concrete wastes generated during nuclear facility decommissioning. By utilizing thermomechanical and chemical treatment processes, the majority of radioactive contaminants can be effectively removed, resulting in a 75% reduction in waste volume and lowering overall decommissioning and waste disposal costs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
